Two ipsilateral early responses examples. The top two averaged sensor data plots are from a right-handed subject, the bottom two are from a left-handed subject. Figures in the left column show the two subjects' sensor plots at the early ipsilateral (left hemisphere) response peak moment under the LD2 stimulation condition. The peak ipsilateral (left hemisphere) response is still weaker than the contralateral (right hemisphere) response, though the right hemisphere response is not at its peak at this time. Figures in the right column show similar results for RD2 stimulation. Both LD2 and RD2 stimulation elicited bilateral early responses in these two subjects.
Zhu et al. BMC Neuroscience 2007 8:21 doi:10.1186/1471-2202-8-21